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128 ◆ Y. M. AL-SODANY, M. N. SHEHATA & K. H. SHALTOUT chemical properties. Fine fractions (
Habitat type C (%) P (%) Second dominant species C (%) P (%) First dominant species Coastal plain Coastal hill Plateau Wadi SS SD SF SW LW FT ST NE SE WB G/P (%) VG N Total Sp. I 130 113 81.3 8 12 12 12 12 35 12 Juniperus phoenicea 80 48 Sarcopoterium spinosum 73 42 II 6 17 3.8 100 Crucianella maritima 100 14 Suaeda vermiculata 83 19 III 7 16 4.4 71 29 Retama raetam 71 69 Thymelaea hirsuta 71 30 IV 12 14 7.5 83 17 Pancratium maritimum 75 33 Ammophila arenaria 67 29 V 5 11 3.1 100 Cichorium spinosum 100 72 Limoniastrum monopetalum 60 18 VI 5 11 3.1 100 Limoniastrum monopetalum 100 63 Tamarix africana 80 27 ecologia mediterranea, tome 29, fascicule 2, 2003, p. 125-138 VEGETATION ALONG AN ELEVATION GRADIENT IN AL-JABAL AL-AKHDAR, LYBIA ◆ Fig. 2. The relationship between the 6 vegetation groups generated after application of TWINSPAN (A) and their cluster centroids on the first and second axes of DECORANA (B). The vegetation groups are: I: Juniperus phoenicea – Sarcopoterium spinosum, II: Crucianella maritima – Suaeda vermiculata, III: Retama raetam, IV: Pancratium maritimum – Ammophila arenaria, V: Cichorium spinosum, VI: Limoniastrum monopetalum. Table 2. Characteristics of the 6 vegetation groups (VG) derived after the application of TWINSPAN on the vegetation of Al-Jabal Al-Akhdar area. N: number of stands, G/P: the percentage of the stands representing each vegetation group in relation to the total sampled stands, P: presence of species (%), C: absolute cover of species (m /100 m). The vegetation groups are: I: Juniperus phoenicea – Sarcopoterium spinosum, II: Crucianella maritima – Suaeda vermiculata, III: Retama raetam, IV: Pancratium maritimum – Ammophila arenaria, V: Cichorium spinosum, VI: Limoniastrum monopetalum. The habitats of coastal plain are: SS: saline sand flats, SD: coastal sand dunes, SF: sand flats; those of coastal hill are: SW: seaward slope and LW: leeward slope; those of the plateau are: FT: first terrace and ST: second terrace; and those of wadis are SE: south-east slope, NE: north-east slope and WB: wadi bed. 129
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Phenotypic and phenological behavio
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PHENOTYPIC AND PHENOLOGICAL BEHAVIO
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Variabilité morphologique et alloz
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VARIABILITÉS PHÉNOTYPIQUE ET GÉN
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Diversité génétique des populati
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DIVERSITÉ GÉNÉTIQUE DE POPULATIO
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Populations Code DIVERSITÉ GÉNÉT
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218 ◆ M. BARBERO INTRODUCTION Une
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220 ◆ M. BARBERO frutescens, Pote
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222 ◆ M. BARBERO loppé avec, dan
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224 ◆ M. BARBERO La dégradation
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226 ◆ M. BARBERO ticum, Hepatica
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228 ◆ M. BARBERO — une unité p
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230 ◆ M. BARBERO tes crêtes de l
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232 ◆ M. BARBERO loppées sur tou
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234 ◆ M. BARBERO — constitution
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236 ◆ M. BARBERO Etage méso-méd
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238 ◆ M. BARBERO L’étage monta
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240 ◆ M. BARBERO Bibliographie Ce
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242 ◆ M. BARBERO CAILLIAU A., 200
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244 ◆ M. BARBERO terranéen dans
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246 ◆ M. BARBERO répartition de
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262 ◆ ANALYSES D’OUVRAGES paysa
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264 ◆ ANALYSES D’OUVRAGES tradi
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